<template>
  <div>
    <vxe-switch v-model="showFooter">表尾开关</vxe-switch>
    <vxe-table
      border
      height="300"
      :show-footer="showFooter"
      :data="tableData"
      :footer-method="footerMethod">
      <vxe-column field="seq" type="seq" width="70"></vxe-column>
      <vxe-column field="name" title="Name"></vxe-column>
      <vxe-column field="sex" title="Sex"></vxe-column>
      <vxe-column field="num" title="Num"></vxe-column>
      <vxe-column field="address" title="Address" show-overflow></vxe-column>
    </vxe-table>
  </div>
</template>

<script lang="ts">
import Vue from 'vue'

interface RowVO {
  id: string
  name: string
  role: string
  sex: string
  num: string
  address: string
}
function sumMethod (list: RowVO[] = [], field: string) {
  let num = 0
  list.forEach(row => {
    num += Number(row[field])
  })
  return num
}

export default Vue.extend({
  data () {
    const tableData: RowVO[] = [
      { id: '10001', name: 'Test1', role: 'Develop', sex: 'Man', num: '28', address: 'test abc' },
      { id: '10002', name: 'Test2', role: 'Test', sex: 'Women', num: '22', address: 'Guangzhou' },
      { id: '10003', name: 'Test3', role: 'PM', sex: 'Man', num: '32', address: 'Shanghai' },
      { id: '10004', name: 'Test4', role: 'Designer', sex: 'Women', num: '24', address: 'Shanghai' },
      { id: '10005', name: 'Test5', role: 'Develop', sex: 'Man', num: '42', address: 'Guangzhou' },
      { id: '10006', name: 'Test6', role: 'Test', sex: 'Women', num: '39', address: 'Shanghai' },
      { id: '10007', name: 'Test7', role: 'Develop', sex: 'Man', num: '46', address: 'Shanghai' },
      { id: '10008', name: 'Test8', role: 'PM', sex: 'Women', num: '49', address: 'Guangzhou' }
    ]

    return {
      showFooter: true,
      tableData
    }
  },
  methods: {
    footerMethod ({ columns }) {
      const data = this.tableData
      return [
        columns.map((column, index) => {
          if (index === 0) {
            return '合计'
          }
          if (column.field === 'num') {
            return sumMethod(data, column.field)
          }
          return '-'
        })
      ]
    }
  }
})
</script>
